Improvement in combined latqh and bolt



I. A. SHERMAN.

COMBINED LATCH AND BOLT. 7 Q 7 PatentedMarchliB. 187 No.188,308.

NJETERQ PHuTc-UTHOGRAPHER. WASMINGTOl D c ATENT OFFICE.

IMPROVEMENT IN COMBINED LATCH AND BOLT.

Specification forming part of Letters Patent No. 188,308, dated March13, 1877; application filed June 11, 1875.

To all whom it may concern Be it known that I, JACOB A. SHERMAN, of thecity and State of New York, have invented an Improvement in Lock-Bolts,of which the following is a specification:

Bolts for doors, safes, 8w, have been moved endwise by the action of apinion upon a rack, such pinion being turned by a handle attached to thesame, or otherwise. A bolt has been projected by a pinion acted upon bya key, and a cylindrical case been provided bolt.

In the drawing, Figure 1 is a longitudinal vertical section of the bolt,and Fig. 2 is a sectional plan at the key.

The case a is cylindrical, and made with a screw, 12, at the inner end,and a circular flange, c, at the outer end; and this case is easilyinserted into a hole bored for its reception, and secured in place bythe screw b. The bolt d fits within the case a, and the rear portion orshank is reduced and formed as a rack, e. f is a spring, that serves toproject the bolt when used as a latch.

The pinion l is made with teeth that taper toward the end of the key, sothat the pinion is inserted with facility into the rack-teeth, and bythe rotation of the pinion the bolt can be moved endwise in eitherdirection.

If the pinion Z is made with a shank, it may be used as a key. It,however, will usually be connected with the handle m, and the same areheld in place by the rose or washer n, that is screwed to the face ofthe door.

At It is an escutcheon for the key-hole, the latter being bored at rightangles to the bolt. The key 0 is inserted from the opposite side to thehandle m, and acts upon the talon p of the latch portion d. The rack eand latch are connected by the tongue q, running between the forks ofthe rack, and the crosspins 2, or stops, determine the amount of motion,so that the latch can be operated upon by the key without moving therack or handle.

The collar 3 around the shank of the latch d serves as an abutment forthe spring f, and this collar is held by the lateral pin or screw 5,that enters a groove in said collar. When this clamping-screw holds thecollar, the latch d is operative as a latch only 5 but when the screw isslackened the latch can be projected by the action of the pinion I, soas to form a bolt. When this is done the talon p is moved forward, sothat the key becomes useless, or cannot be inserted.

By this construction the latch is available as such for ordinary use,and, when projected as a bolt, the same is very secure, and the keycannot be used.

To hold the latch back entirely out of use, a notch may be provided uponthe handleshank, and a pawl, o, pivoted to the rose a, so as to retainthe knob and pinion from revolving.

The bolt, when projected, enters a case, 0, that is circular, andinserted into a hole bored into the casing or frame, and within the case0 is a spring, 8, and button t. The spring and button yield to the boltor latch as it is moved endwise against the button t,- but when the boltis withdrawn the button t is projected to the end of the case 0, so asto form a stopper to such bolt-hole, and there by prevent theobjectionable appearance that the hole would otherwise present,especially in thejamb of a door.

I claim as my invention 1. The collar 3 around the shank of the latch,forming an abutment for the spring f, in combination with the movablepin or screw 5, rack e, and pinion l, substantially as and for thepurposes specified.

2. The talon p for the key upon the inner end of the spring-latch, incombination with the tongue q, rack e, pinion l, and stops 2 2,substantially as set forth.

Signed by me this 23d day of February, A. D. 1874.

J. A. SHERMAN.

Witnesses:

GEO. '1. PINOKNEY, OHAs. H. SMITH.

